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July 8, 2025
All topics Database MySQL NoSQL Others PostgreSQL Security Tools

🔐 sqlmap: Automate SQL Injection Testing Like a Pro in 2025

Table of Contents What is sqlmap? Why SQL Injection Still Matters Installing sqlmap Basic Usage…

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Lê Hoàng Tâm
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June 29, 2025
All topics Database Gems MySQL Others PostgreSQL Ruby Ruby on Rails Tips

How a Simple Migration Took Down Our System for 20 Minutes — And How to Never Let That Happen Again

"ALTER TABLE looked harmless. On staging, it ran in 0.4s. In production, it locked the…

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Lê Hoàng Tâm
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February 23, 2025
All topics MySQL Tips

SQL Performance Battle: GROUP BY vs. Self-Join in UPDATE Queries

Which SQL UPDATE query performs better: one using GROUP BY or a self-join? This in-depth…

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Lê Hoàng Tâm
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December 24, 2024
All topics Database MySQL Others Tips

Optimizing GROUP BY in MySQL: Insights from Real-Life Query Analysis

My current query: SELECT eod.date, SUM(eod.stable_price) AS sumStablePrice FROM item_eod eod WHERE eod.date >= CURRENT_DATE…

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Lê Hoàng Tâm
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Database optimization
December 7, 2024
Database Interview Question MySQL NodeJS NoSQL PostgreSQL

Top 10 Database Optimization and Recovery Strategies for Senior Software Engineers

Master essential database concepts like indexing, query optimization, caching, partitioning, failover, and recovery strategies with…

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Hoài Nhớ
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Optimize Scalability with Cache
November 13, 2024
All topics

7 Essential Caching Strategies to Boost Backend Performance and Scalability

Discover 6 powerful caching strategies to enhance backend performance and scalability. From in-memory and distributed…

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Hoài Nhớ
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November 8, 2024
All topics Database MySQL

Enhancing Text Search in MySQL: A Comparison of SOUNDEX and Full-Text Search

In many applications, efficient text search capabilities are critical for delivering fast and relevant results…

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Lê Hoàng Tâm
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October 22, 2024
All topics Database PostgreSQL

Postgres Index Methods: Things you need to know

In PostgreSQL, different types of index methods are used to optimize query performance, especially for…

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Lê Hoàng Tâm
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September 25, 2024
All topics Architecture & Design Database PostgreSQL Ruby on Rails

A Deep Dive into Schema-Based Multi-Tenancy: Scaling, Maintenance, and Best Practices

Introduction As your application scales and serves multiple tenants, choosing the right multi-tenancy architecture is…

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Lê Hoàng Tâm
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September 12, 2024
All topics Database PostgreSQL

Understanding PostgreSQL WAL and How It Can Save Your Data

PostgreSQL’s Write-Ahead Logging (WAL) system is a fundamental component that ensures database durability, data integrity,…

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Lê Hoàng Tâm
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Recent Posts

  • 🔐 sqlmap: Automate SQL Injection Testing Like a Pro in 2025 July 8, 2025
  • How a Simple Migration Took Down Our System for 20 Minutes — And How to Never Let That Happen Again June 29, 2025
  • Prompt Injection: The Hidden Security Risk in AI Agents (And How to Prevent It) June 24, 2025
  • The Ultimate Guide to Image Rendering in ReactJS: Performance, SEO, and Best Practices (2025) June 11, 2025
  • Essential Responsive Design Tips for React Developers June 10, 2025

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